Now you know what it was like for the Knicks to match up against Tim Duncan and David Robinson last night.

Unable to scale San Antonio’s two 7-footers, the Knicks were outrebounded by the overwhelming margin of 49-34 and shot just 41.3 percent.

As if that wasn’t enough, the Spurs had nine blocks.

Wasn’t New York supposed to be the city of skyscrapers?

So with that devastation, it was no wonder the Knicks fell 96-89 in Game 4 of the Finals at the Garden to fall behind three games to one.

“Well, size does matter in this league,” Knicks coach Jeff Van Gundy said. “It does. And particularly in the playoffs.

“And their size beat our speed and quickness tonight because not only did they affect us on the boards and in the post scoring, but every penetration was a difficult, difficult shot because of their shot-blocking. Those guys are great, great players.”

“They dominated on the glass tonight,” Kurt Thomas understated. “They got a lot of tips. With their height they were able to get the rebounds. We have to put a body on them.”

The 7-foot Marcus Camby, the only Knick to reach double figures in rebounding with 13, needed help. But the injured Larry Johnson, 6-5 and with a injured knee, was useless with only six rebounds, and the 7-0, $28 million Chris Dudley had three boards in seven minutes.

“When they’re missing shots we can’t rebound the ball and they get more possessions than us,” said Camby. “It definitely makes the game tough on us. We know we have to do a better job on Friday on the boards in order to get the win.”

Added Van Gundy, “Their size and athleticism beat us.”

“They were big and stepped up and got the ball when they had to,” said Latrell Sprewell, who scored 26 points but did not drive to the basket as often as usual. “We live and die with the perimeter shots and the perimeter players. We just don’t have the inside presence.”